code: def _normalize_expr_name(name):
      return re.sub("(?!^)([A-Z]+)", r"_\1", name).lower()
  
file_path: m2cgen/m2cgen/interpreters/utils.py
imports: import math
  import re
  from collections import namedtuple
  from functools import lru_cache
  import numpy
  from m2cgen.ast import TOTAL_NUMBER_OF_EXPRESSIONS
label_desc: Use image node_id 3 for calling a global function with example usage: _normalize_expr_name(name) and returns: re